Exit-door lock.



H. w; DYER,

EXIT DOOR LOCK. APPLICATION FILI-IO APIL29. 1,911.

Patented Apr. 18,1916. j

1,1so,o 24.1

2 SHEETS-SHEET I.

RI m N E, v IN.

H. w. DYER.

EXIT DOOR LOCK. APPLICATION FILED APR. 29 |911.

"Patented Apr. 18,1916.

SHEETS-sneer 2.

wuz

WITNESSES ATTORNEY' nary lock.

retractingloc'king boltsand leaving thedoor atl order to facilitate the openingof the door from the outside when necessary eac-h bolt l is provided with a notched extension 17 constituting in eifect a short rack; These extensions 17 overlap each other and the notches are' arranged on the inner faces of r the extension `so that vthe cross Vor fourtoothed gear 18 arranged between them will engage the notches in both extensionssimultaneously. This `cross 18is rotatively mount.- ed and is adapted to be operated With a key free to swing open. "Assoon as the door is opened andthe pressure on plate 9 is released the spring pressed block 1l Will act upon the arms 3 and force-them back into normal position thus forcing `the bolts 1 outn ward into locking positionagain.

Having thus described .my .invention,vvhat l I claim is new and desire to secureby Letters Patent, is;`

` 1. In an eXit door lock, `apair of opposite bolts, a lever foreach of said bolts, said levers having acommon fulcrum, a pair yof ,toggle linksconnecting said levers intermediate said boltsv and their fulcrum, an operating plate pivoted to said door and oprating said toggle links "to Withdraw said olts. y v r2.In a door lock, the combination of a applied against the outside of said plater l the bolts Will be retracted, means for. automatically restoring the pressurejplate` to normal position, and spring#pressed means for protracting the'bolts when the pressure plate is returned to normal position.

3; In a door lock, the combination cfa? Y door, a locking bolt therefor, a recessed lle-5v`4` ver pivotally connected to the bolty forpola.-`

erating the same, a pressure plate connected to said door, a lug on the pressureplate` f which coacts with said .recessed lever toLi retract the bolt when pressure is applied,y

against the outside of thepressureplate.

4. In a door lock, the combination of@ door, a locking bo-lt therefor, a recessed `lever pivotally connected -to the bolt `for op erating the same, a pressure plate connected to said door, a lug on said pressure plate adapted to coact With said recessed yle'vqqr, and a lever pivoted to said .bolt-opera' lever and having a link connection with i.

pressure plate whereby when pressure isigte y e 7 plied against the outside of said pla bolt Will be retracted.

In testimony whereof `I have signed my name hereto in the presence of Witnesses.

HARRY `W. Dinant.v

Witnesses:

BAXTER MoRToN, c ADoLPH-M. WEISS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patenti. I i Washington, D. C. 

